Explanation: This balloon size measuring instrument box has a total of 11 different sizes of holes, including 2 inches, 3 inches, 3.5 inches, 4 inches, 4.5 inches, 5 inches, 6 inches, 7 inches, 8 inches, 9 inches, and 10 inches. Balloon Size Measurement This balloon size tester box can be used to measure the size of balloons, and can measure 11 sizes of balloons. Easy to view size. Each circle has size data next to it, making it easy to check the size and obtain the size of the balloon. It is not easy to wear this balloon size measuring device. The box is made of PP material, and the size measuring device is not easy to wear and damage, and can be used for a long time. The appropriate OCCASIONS supports cleaning and is perfect for making balloons for birthday parties, weddings, baby showers, and any other celebration activities. Installation steps: 1. Splice the "5-inch" side and the "7-inch" side together. Splice the "9 inch" side with the "5 inch" and "7 inch" sides for 3. Splice the "6 inch" side with the "7 inch" and "9 inch" sides for 4. Splice "8 inches" and "9 inches", then splice "5 inches" and "6 inches" together. 5. The 10 inch side is spliced together with the 5 inch, 7 inch, 8 inch, and 6 inch sides, respectively. Specification: Material: PPC Color: Transparent Size (approximately): 30 x 23 x 28 cm/11.81 x 9.06 x 11.02 inches (length x width x height) Packaging: 1 set x balloon size measuring box (not assembled)